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नवीनतम संदेश 123
2021-07-07 06:30:27
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5.5K views03:30
2021-07-06 17:57:11
Important Update !! JEE Mains Exam Dates - Live announcement by Manoj Chauhan Sir !! Watch NOW. Ace your preparation and stay ahead with all the updates. #LetsCrackIt
63 views14:57
2021-07-06 13:44:28
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39 views10:44
2021-07-06 04:02:42
On Popular Demand, Unacademy is back with IIT JEE SUMMER TEST CARNIVAL !!!
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108 views01:02
2021-07-05 15:15:43
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2021-07-05 10:45:38
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3.5K views07:45
2021-07-04 14:36:14
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31 views11:36
2021-07-04 14:34:37
Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
Permanent Tissue is further categorized as −
Simple Permanent Tissue and
Complex Permanent Tissue
Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
Parenchyma
Collenchyma
Sclerenchyma
Epidermis
Parenchyma tissue provides support to plants and also stores food.
Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
The cells of Sclerenchyma tissue normally are dead.
The outermost layer of cells is known as epidermis.
The epidermis is usually made up of a single layer of cells.
The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
Complex Permanent Tissue is categorized as;
Xylem
Phloem
Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
Xylem is accountable for the conduction of water and mineral ions/salt.
Phloem, normally, is made up of four types of elements namely −
Sieve tubes
Companion cells
Phloem fibers and
Phloem parenchyma
Phloem tissue transports food from leaves to other parts of the plant
32 views11:34
2021-07-03 14:30:20
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